Die set



June 20, 1933. K. JANISZEWSKI .DIE SET Filed Sept. 28, 1928 2 Sheets-Sheet 1 June 20, 1933. K. JANlszEwsKl DIE SET Filed Sept. 28. 1928 2 Sheets-Sheet 2 Patented June 28, 1933 UNETED STATES PATENT orrics KASIMIR JANISZEWSKI, F MI LWA UKEE, WISCONSIN, ASSIGNOR TO SUPERIOR TOOL AND DIE COMPANY, OF MILNAUKF'E, WISCONSIN, A CORPORATION OF WISCONSIN DIE SET Application filed September 28, 1928. Serial No.

My invention relates to die sets and has, among its other objects, the production of die sets that are durable, convenient, ellicient and satisfactory for use wherever found applicable.

Some difficulty has been experienced in the past in properly aligning the punch and die upon a die set. A slight discrepancy in the alignment of the die and punch will result in unnecessary expense and waste.

A particular object of my invention, therefore, is to provide an improved die set which will embody means whereby the dieand punch can be accurately aligned when they are being secured thereto.

Another particular object of the invention is to provide improved apparatus for preparing a die set.

Still another particular object of my invention is to provide means on a die set for preventing the improper location of bolt holes, or the like.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claim.

In the drawings, wherein like reference characters indicate like or corresponding parts:

Fig. 1 is a top plan view of a d1e set embodying my invention, improved marking apparatus being shown in connection therewith;

Fig. 2 is a section taken on line 22 of Fig. 1;

Fig. 3 is a bottom plan view of the punch holder of the die set illustrated in Fig. l, the punch holder being positioned upon a face plate;

Fig. lis a top plan view of the die shoe of the die set illustrated in Fig. 1, the die shoe being positioned upon a face plate;

Fig. 5 is a perspective view of the improved die set shown in Fig. 1;

50 Fig. 6 is a section taken through the improved die set, a punch and die being shown assembled therewith Fig. 7 is a bottom plan view of the improved die shoe, the punch being shown in connection therewith; and

Fig. 8 is a top plan view of the improved die shoe, the die being shown in connection therewith.

In the drawings, I have shown a die set and marking apparatus embodying the invention, the die set comprising, in this instance, a punch holder 10 and a die shoe 11. A cylindrical shank or stem 12 projects from the punch holder 10 to provide means whereby it may be secured to the ram of a press. The die shoe 11 is preferably secured to the bolster plate, or the equivalent, of the press. Leader pins 13 secured to the die shoe 11 project through apertures 14 provided in the punch holder 10, the construction being such that the punch holder may reciprocate upon the pins. Obviously, the leader pins 13 hold the punch holder 10 in alignment with the die shoe 11.

he punch holder 10 is preferably provided with a pair of lugs 15 having flat finished surfaces 15a aligned in the same plane and the die shoe 11 is preferably provided with a pair of similar lugs 16 which are likewise provided with flat finished surfaces 16a lying in the same plane. The purpose of this construction will presently appear.

The marking apparatus embodying my invention is indicated generally at 20 and .85 preferably comprises a bracket 21 having a web portion 26 and two arms 23 and 23a, a V-shaped notch 22 for embracing the stem or shank 12 being provided in the arm 230;. Set screws 24 and 25 are provided in the arms 23 and 23a, respectively. Slidably mounted in the web portion 26 is a plug 28 which is preferably formed from tool steel, or the equivalent. Plug 28 is provided with aligned sharp points 29 at its ends. A set-95 screw 30 screw-threaded into the web portion 26 projects into a slot 31 in the plug 28 and prevents it from dropping out of the bracket; The points 29 are preferably arranged so they coincide with the lOngitudi-AOO nal axis of the shank or stem 12 when the marking apparatus is assembled in the die set in the manner illustrated in Figs. 1 and 2. However, it will be readily understood that it is not absolutely necessary that the points 29 coincide exactly with the longitudinal axis of the stem'or shank 12. In fact, in some instances, I may prefer to have the points 29 spaced laterally from the longitudinal axis of the shank or stem 12.

The apparatus is used in the following manner: The punch holder 10, die shoe 11 and the marking apparatus 20 is assembled in the manner illustrated in Figs. 1 and 2 so that the V-shaped notch 22 embraces or engages the shank or stem 12. The set screws 24 and 25 are then manipulated to rigidly secure the bracket 21 to the punch holder, after which the punch holder is struck a sharp blow with a hammer, or the like, on the upper end of the shank or stem 12. This causes the sharp points 29 to sink into the opposed faces of the punch holder and the die shoe so as to leave aligned punch marks or indentations 36 therein when the marking apparatus is removed fromthe die set. It will be noted that the aligned punch marks 36 are formed simultaneously in the two members of the die set. The punch marks provide means whereby the punch and die may be accurately aligned when they are secured to the die set.

I prefer to inscribe a circle 46 on the bottom face of the punch holder 10, the diameter of the circle 46 being substantially equal to the diameter of the shank 12 so that workmen may arrange screw holes, or the like, in the punch holder in such manner that they will not be too close to the shank. Of course, when I provide the circle, I prefer to have the punch marks 36 coincide more or less with the longitudinal axis of the shank or stem 12.

The die sets provided with the punch marks 36, and if so desired, with the inscribed circles 46, are then in such condition that they can be sold to the trade. When they are to be prepared for the punch holder and the die shoe, the position of the screw or bolt holes in the punch and die are noted and corresponding holes are formed in the punch holder and the die shoe. These bolt holes are preferably located in the punch holder and the die shoe by placing each of these members in turn upon a face plate 35 as illustrated in Figs. 3 and 4, the members being arranged to rest upon their finished surfaces 15a and 16a. Suitable tools may then be employed to locate the holes in the members with respect to the punch marks 36. Thus, in Figs. 3 and 1, I have indicated a series of arcs 47 of equal radii which are struck by em- 05 ploying the punch marks 36 as centers.

Then by using other suitable tools familiar to those skilled in the art, the corresponding center lines 48 and 49 are inscribed upon the punch holder and the die set to intercept the arcs 17, the intersections of the center lines and the arcs being the centers of the bolt holes. After the bolt holes have been drilled, a punch 40 may be assembled with the punch holder 10 as illustrated in Figs. 6 and 7 and a die 41 may be secured to the die shoe 11 as illustrated in Figs. 6 and 8, screws or bolts 45 being preferably employed to secure the punch and die to the members of the die set.

Having thus described my invention, it is obvious that various immaterial modifications maybe made in the same without departin from the spirit of my invention; hence do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned.

What I claim as new and desire to secure by Letters Patent is:

A punch holder having a shank member on its top face whereby it may be secured to the ram of a press, said punch holder having a circle inscribed on its bottom face to indicate the position and diameter of said shank.

In testimony whereof, I have hereunto signed my name.

KASIMIR J ANISZEWSKI. 

